Security is one of the most important concerns for everybody. Everybody wants to secure their home, offices, industry from unauthorized persons. To make this task an easy, this is one of the cheap and best system.

This project and implimentation consists of LCD which shows that whether the person entered is authorized or not. The user, who wants to enter into the room or office, has to enter a pin or password through keypad and if the entered password is correct the door will open. The verification of password is done by using microcontroller which stores all authorized passwords and accordingly instructs the other peripherals i.e. door (using stepper motor) to open. If the password entered is wrong a beep or a buzzer will be ON and LED will glow. As well as the persons details such as name, id can be shown on display i.e. LCD.

The components uses in this project and implimentation are AT89S52 Micro controller, LCD and a normal telephone keypad. The system is fully controlled by the 8 bit microcontroller AT89s52. The password is stored in memory of that we can change it at anytime. The software which is used as a backenend is Embedded C KIEL uvision

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